Pillow



FIG. 1 is a top, front and right side perspective view of a pillow showing my new design;

FIG. 2 is a top, rear and left side perspective view thereof;

FIG. 3 is a top plan view thereof, the undisclosed bottom being plain and unornamented; and

FIG. 4 is a front elevational view thereof. 

The ornamental design for a pillow, as shown and described. 